<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area border-topbottom">
        <div class="title">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">北京</div>
          </div>
        </div>
      </div>
      <div class="area border-topbottom">
        <div class="title">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item of hotCities" :key="item.id">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area border-topbottom" v-for="(item, key) of cities" :key="key" :ref="key">
        <div class="title">{{key}}</div>
        <div class="item-list">
          <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
export default {
  name: 'cityList',
  props: {
    cities: Object,
    hotCities: Array,
    letter: String
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<style lang="stylus">
.border-topbottom
  &:before
    border-color: #ccc;
  &:after
    border-color: #ccc;
.border-bottom
  &:before
    border-color: #ccc;
  &:after
    border-color: #ccc;
.list
  overflow: hidden;
  position: absolute;
  top: 1.58rem;
  right: 0;
  left: 0;
  bottom : 0;
  .title
    line-height: .54rem;
    background: #eee;
    padding-left: .2rem;
    color: #666;
    font-size: .26rem;
  .button-list
    overflow: hidden;
    padding: .1rem .6rem .1rem .1rem;
    .button-wrapper
      float: left;
      width: 33.33%;
      .button
        margin: .1rem;
        padding: .1rem 0;
        text-align: center;
        border: .02rem solid #ccc;
        border-radius: .06rem;
  .item-list
    .item
      line-height: .7rem;
      padding-left: .2rem;
</style>
